Self-Diagnosis Method - Panasonic CU-FZ25WKE Series Installation Instruction

17.5 Self-diagnosis Method

17.5.1 H11 (Indoor/Outdoor Abnormal Communication)
Malfunction Decision Conditions

During startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal
transmission is checked whether it is normal.
Malfunction Caused

Faulty indoor unit PCB.

Faulty outdoor unit PCB.

Indoor unit-outdoor unit signal transmission error due to wiring error.

Indoor unit-outdoor unit signal transmission error due to breaking of wire in the connection wires between the
indoor and outdoor units.
Troubleshooting
95